Abstract
The oxidative metabolism of aldicarb (ALD), a carbamate pesticide, and fenbendazole (FBZ), an anthelmintic, was studied using cultured hepatocytes obtained from 4 goats and a bullock and incubated with ALD (50 μmol/L) and FBZ (10 μmol/L). The parent compounds and the metabolites were measured by HPLC. Both compounds are metabolized at the sulphur atom via two sequential oxidations, first to the sulphoxide (aldicarb sulphoxide and oxfendazole, respectively) and then to the sulphone. Oxfendazole and fenbendazole sulphone from FBZ, and aldicarb sulphoxide from ALD were found in both species. Aldicarb sulphone was not produced by the hepatocyte preparations from the bullock. The good correlation obtained comparing the in vitro results of FBZ metabolism with published in vivo dat obtained on FBZ kinetics in the same species confirmed the usefulness of in vitro models for predictive analysis of in vivo xenobiotic biotransformations.
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Abbreviations
- ALD:
-
aldicarb
- ALDSON:
-
aldicarb sulphone
- ALDSOX:
-
aldicarb sulphoxide
- BSA:
-
bovine serum albumin
- ID:
-
internal diameter
- EGTA:
-
ethylene glycol bis(β-aminoethyl ether) N,N,N′,N′-tetraacetic acid
- FBZ:
-
fenbendazole
- FBZSON:
-
fenbendazole sulphone
- HBSS:
-
Hanks' balanced saline solution
- HPLC:
-
high-pressure liquid chromatography
- LDH:
-
lactate dehydrogenase
- MFO:
-
mixed function oxidase
- NCS:
-
newborn calf serum
- OXF:
-
oxfendazole
- WME:
-
Williams' Medium E
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Montesissa, C., Anfossi, P., Van't Klooster, G. et al. The use of cultured hepatocytes from goats and cattle to investigate xenobiotic oxidative metabolism. Vet Res Commun 20, 449–460 (1996). https://doi.org/10.1007/BF00419182
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DOI: https://doi.org/10.1007/BF00419182